Paint spraying device for steel pipe production and processing

Abstract

The invention belongs to the technical field of steel pipe paint spraying, and particularly relates to a paint spraying device for steel pipe production and machining, the paint spraying device comprises a box body and a paint spraying gun, a workbench is fixed in the box body, hydraulic cylinders are installed at the two ends of the workbench, the output ends of the two hydraulic cylinders are connected with positioning plates, and the positioning plates are slidably connected to the workbench; a paint spraying mechanism for spraying paint on the steel pipe is arranged on the positioning plate; the paint spraying mechanism comprises a rotating disc rotationally connected to the inner wall of the box body, a motor used for driving the rotating disc to rotate is installed on the side wall of the box body, a sliding groove is formed in the side wall of the rotating disc, and a pin shaft is arranged in the sliding groove in a sliding fit mode. The position of the pin shaft in the sliding groove can be automatically adjusted according to the length of a steel pipe, then the swing amplitude of the paint spraying gun is adjusted, the swing range of the paint spraying gun is consistent with the length of the steel pipe, and the situation that paint spraying coverage is incomplete or paint is wasted is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of steel pipe painting, and in particular relates to a painting device for steel pipe production and processing. Background Art

[0002] In order to improve the corrosion resistance and service life of the steel pipe surface, it is often necessary to paint the surface during steel pipe processing. Usually, the paint is evenly sprayed on the surface of the fitting with a spray gun, and then the paint is dried and cured to form a hard coating.

[0003] After searching, the national patent publication number CN209631465U discloses a paint spraying device for the production and processing of mechanical parts; it can improve the convenience of paint temperature regulation, improve the flexibility of paint viscosity regulation, reduce the use limitations of the device, improve the convenience of use of the device, increase the paint drying speed, reduce the drying time, reduce the impact on later processing and use, reduce the tediousness of manual transportation of plates, reduce the use of labor, and improve the convenience of use of the device.

[0004] In the prior art, the painting of steel pipes is often performed by moving a handheld paint spray gun along the length direction of the steel pipe. However, this method is not only labor-intensive and unsuitable for continuous processing and production, but also prone to problems such as uneven paint thickness and incomplete coverage due to manual operation. The above scheme proposes a paint spraying device for the production and processing of mechanical parts, which can reduce the labor intensity of the staff. However, the scheme still has the following problems in specific implementation:

[0005] 1. This solution cannot adjust the spraying position and moving distance of the paint spray gun according to the length of the steel pipe. If the position and distance of the paint spray gun are greater than the length of the steel pipe, it will cause a waste of paint. On the contrary, if the position and distance of the paint spray gun are less than the length of the steel pipe, the paint will not be fully covered.

[0006] 2. When painting each side of the steel pipe, the staff needs to manually flip it over, and additional power equipment will be set up to realize the rotation of the steel pipe, which is costly. The painting and the turning of the steel pipe operate independently, and cannot achieve efficient coordinated operation, which leads to low overall operating efficiency of the equipment. Summary of the invention

[0007] The purpose of the present invention is to provide a paint spraying device for steel pipe production and processing in order to solve the problems of low paint spraying efficiency and poor effect mentioned in the above background technology.

[0008] To achieve the above-mentioned purpose, the present invention adopts the following technical solutions: A paint spraying device for steel pipe production and processing, comprising a box and a paint spraying gun, a workbench is fixed in the box, hydraulic cylinders are installed at both ends of the workbench, and the output ends of the two hydraulic cylinders are connected to positioning plates, the positioning plates are slidably connected to the workbench, and a paint spraying mechanism for spraying paint on the steel pipe is arranged on the positioning plate;

[0009] The paint spraying mechanism comprises a rotating disk rotatably connected to the inner wall of the box body, a motor for driving the rotating disk to rotate is installed on the side wall of the box body, a slide groove is opened on the side wall of the rotating disk, a pin shaft is slidably fitted in the slide groove, a swing frame is slidably sleeved on the pin shaft, a push-pull rod is fixedly connected to the swing frame, the push-pull rod is slidably arranged on the positioning plate, the paint spraying gun is installed on the push-pull rod, when the rotating disk rotates, the push-pull rod is driven to reciprocate, so that the paint spraying gun moves back and forth along the length direction of the steel pipe to spray paint;

[0010] The chute is provided with a bellows arranged along its length direction, and the two ends of the bellows are respectively connected with the pin shaft and the inner wall of the chute, a fluid cylinder is fixed on the workbench, and the output end of the fluid cylinder is connected with the bellows through a connecting pipe, and the bellows and the fluid cylinder are filled with magnetorheological fluid, and piston rods are fixed on the side walls of the two positioning plates, and the piston rods extend into the fluid cylinder and are fixed with piston plates, and the piston plates are sealingly slidably matched in the fluid cylinder, and when the two positioning plates are close to each other to position the steel pipe, the magnetorheological fluid is squeezed into the bellows, and the pin shaft is pushed to move in the chute, so as to realize painting of steel pipes of different lengths.

[0011] Furthermore, positioning chucks are rotatably connected to the side walls of the two positioning plates that are close to each other.

[0012] Furthermore, a collar is fixedly connected to the upper end of the positioning plate, and the collar is slidably sleeved on the push-pull rod.

[0013] Furthermore, a positioning mechanism for positioning the pin shaft is also provided in the rotating disk, and the positioning mechanism includes two cavities arranged on both sides of the slide slot, a conductive block is slidably connected in the cavity, a power connection plate is fixedly connected in the cavity, and the conductive block is connected to the inner wall of the cavity through a spring.

[0014] Furthermore, the positioning mechanism also includes an electrode plate installed in the cavity, the electrode plate is electrically connected to the power supply through a conductive block and a power connection sheet, and the electrode plates in the two cavities are respectively connected to the positive and negative poles of the power supply. When the conductive block and the power connection sheet are in contact, the electrode plate is energized, the fluidity of the magnetorheological fluid is reduced under the action of the magnetic field, and the positioning of the pin shaft is achieved.

[0015] Furthermore, the positioning chuck is fixedly connected to a rotating shaft coaxial therewith, and a worm gear is fixed to the rotating shaft via a one-way bearing.

[0016] Furthermore, a support plate is fixedly connected to the side wall of the positioning plate, a worm is rotatably connected to the support plate, and the worm and the worm wheel are meshed with each other.

[0017] Furthermore, a gear is fixedly connected to the upper end of the worm, a tooth groove is provided on the side wall of the push-pull rod along its length direction, and the gear is meshed with the push-pull rod.

[0018] The present invention has the following advantages:

[0019] 1. The present invention sets a rotating disk, a pin shaft, a swing frame and a push-pull rod. When working, the paint spray gun moves back and forth along the length direction of the steel pipe to spray paint fully and evenly. Compared with the prior art, there is no need for workers to hold the paint spray gun, and the degree of automation is high, which effectively improves the problem of uneven paint thickness caused by manual operation.

[0020] 2. The present invention provides a liquid cylinder, a magnetorheological fluid and a bellows, and when clamping and positioning the two ends of the steel pipe, the position of the pin shaft in the slide groove can be automatically adjusted according to the length of the steel pipe, thereby realizing the adjustment of the swing amplitude of the paint spray gun, so that the swing range of the paint spray gun is consistent with the length of the steel pipe, avoiding incomplete paint coverage or waste of paint.

[0021] 3. The present invention sets a positioning mechanism. During the painting operation, the electrode plate is energized, and the fluidity of the magnetorheological fluid is reduced under the action of the magnetic field, thereby fixing the length of the bellows, avoiding deformation due to centrifugal force, and realizing the positioning of the pin shaft, thereby ensuring the accuracy of the reciprocating movement distance of the paint spray gun.

[0022] 4. The present invention arranges gears, worm wheels, worms and one-way bearings, uses push-pull rods as driving force, drives the positioning chuck to intermittently rotate a certain angle, and then realizes the rotation of the steel pipe. There is no need to set up an additional power drive device. The paint spraying position of the steel pipe can be automatically changed, and the reciprocating movement of the paint spray gun and the rotation of the steel pipe can be synchronized and coordinated, thereby improving the efficiency of the painting work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a paint spraying device for steel pipe production and processing provided by the present invention;

[0024] Figure 2 It is a structural schematic diagram of a rotating disk in a paint spraying device for steel pipe production and processing provided by the present invention;

[0025] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0026] Figure 4 It is a schematic diagram of the internal structure of a liquid cylinder in a paint spraying device for steel pipe production and processing provided by the present invention;

[0027] Figure 5 The present invention is a schematic diagram of the side structure of a worm wheel and a worm in a paint spraying device for steel pipe production and processing provided by the present invention.

[0028] In the figure, 1 is a box, 2 is a paint spray gun, 3 is a workbench, 4 is a hydraulic cylinder, 5 is a positioning plate, 6 is a rotating disk, 7 is a motor, 8 is a slide groove, 9 is a pin, 10 is a swing frame, 11 is a push-pull rod, 12 is a bellows, 13 is a liquid cylinder, 14 is a connecting pipe, 15 is a magnetorheological fluid, 16 is a piston rod, 17 is a piston plate, 18 is a positioning chuck, 19 is a collar, 20 is a cavity, 21 is a conductive block, 22 is a connecting sheet, 23 is a spring, 24 is an electrode plate, 25 is a rotating shaft, 26 is a one-way bearing, 27 is a worm gear, 28 is a support plate, 29 is a worm, and 30 is a gear. DETAILED DESCRIPTION

[0029] like Figure 1-5 As shown, a paint spraying device for steel pipe production and processing includes a box body 1 and a paint spraying gun 2. A workbench 3 is fixed in the box body 1. Hydraulic cylinders 4 are installed at both ends of the workbench 3. The output ends of the two hydraulic cylinders 4 are connected to positioning plates 5. The positioning plates 5 are slidably connected to the workbench 3. A paint spraying mechanism for spraying paint on the steel pipe is arranged on the positioning plates 5.

[0030] The paint spraying mechanism includes a rotating disk 6 rotatably connected to the inner wall of the box body 1, a motor 7 for driving the rotating disk 6 to rotate is installed on the side wall of the box body 1, a slide groove 8 is opened on the side wall of the rotating disk 6, a pin shaft 9 is slidably fitted in the slide groove 8, a swing frame 10 is slidably sleeved on the pin shaft 9, a push-pull rod 11 is fixedly connected to the swing frame 10, the push-pull rod 11 is slidably set on the positioning plate 5, and the paint spraying gun 2 is installed on the push-pull rod 11. When the rotating disk 6 rotates, the push-pull rod 11 is driven to reciprocate, so that the paint spraying gun 2 moves back and forth along the length direction of the steel pipe to spray paint. When working, the paint spraying gun 2 moves back and forth along the length direction of the steel pipe to spray paint fully and evenly. Compared with the prior art, there is no need for staff to hold the paint spraying gun, the degree of automation is high, and the problem of uneven paint thickness caused by human operation is effectively improved.

[0031] The chute 8 is provided with a bellows 12 arranged along its length direction, and the two ends of the bellows 12 are connected to the pin 9 and the inner wall of the chute 8 respectively. A fluid cylinder 13 is fixed on the workbench 3, and the output end of the fluid cylinder 13 is connected to the bellows 12 through a connecting pipe 14. The bellows 12 and the fluid cylinder 13 are filled with a magnetorheological fluid 15. The magnetorheological fluid 15 is a suspension formed by ferromagnetic particles of micron or nanometer level immersed in a non-magnetic carrier liquid. The magnetorheological fluid 15 presents low-viscosity Newtonian fluid characteristics in a non-magnetic magnetic field environment, and presents a high-viscosity, low-fluidity Bingham fluid in a strong magnetic field environment. The body, the side walls of the two positioning plates 5 are fixed with piston rods 16, the piston rods 16 extend into the liquid cylinder 13 and are fixed with piston plates 17, the piston plates 17 are sealingly slidably matched in the liquid cylinder 13, when the two positioning plates 5 are close to each other to position the steel pipe, the magnetorheological fluid 15 is squeezed to the bellows 12, and the pin shaft 9 is pushed to move in the slide groove 8, and the position of the pin shaft 9 in the slide groove 8 can be automatically adjusted according to the length of the steel pipe, thereby realizing the adjustment of the swing amplitude of the paint spray gun 2, so that the swing range of the paint spray gun 2 is consistent with the length of the steel pipe, avoiding the situation of incomplete coverage of the paint or waste of paint.

[0032] The side walls of the two positioning plates 5 that are close to each other are both rotatably connected with positioning chucks 18, and the chucks 1 are used to clamp and fix the two ends of the steel pipe.

[0033] A collar 19 is fixedly connected to the upper end of the positioning plate 5. The collar 19 is slidably sleeved on the push-pull rod 11. The collar 19 can limit the moving direction of the push-pull rod 11, so that the paint spray gun 2 moves along the length direction of the steel pipe to spray paint.

[0034] A positioning mechanism for positioning the pin shaft 9 is also provided in the rotating disk 6. The positioning mechanism includes two cavities 20 arranged on both sides of the slide slot 8. A conductive block 21 is slidably connected in the cavity 20, and a power connection sheet 22 is fixedly connected in the cavity 20. The conductive block 21 is connected to the inner wall of the cavity 20 through a spring 23. When the spring 23 is in a natural state, the power connection sheet 22 does not contact the conductive block 21.

[0035] The positioning mechanism also includes an electrode plate 24 installed in the cavity 20. The electrode plate 24 is electrically connected to the power supply through the conductive block 21 and the power connection sheet 22, and the electrode plates 24 in the two cavities 20 are respectively connected to the positive and negative poles of the power supply. When the conductive block 21 and the power connection sheet 22 are in contact, the electrode plate 24 is energized, and a strong magnetic field is formed between the two electrode plates 24. The fluidity of the magnetorheological fluid 15 in the bellows 12 is reduced under the action of the magnetic field, so that the length of the bellows 12 is prevented from changing due to the centrifugal force when the rotating disk 6 rotates, thereby realizing the positioning of the pin shaft and ensuring the accuracy of the reciprocating movement distance of the paint spray gun 2.

[0036] A coaxial rotating shaft 25 is fixedly connected to the positioning chuck 18, and a worm gear 27 is fixed to the rotating shaft 25 via a one-way bearing 26. The one-way bearing 26 can only engage in one rotation direction.

[0037] A support plate 28 is fixedly connected to the side wall of the positioning plate 5, and a worm 29 is rotatably connected to the support plate 28, and the worm 29 and the worm wheel 27 are meshed with each other;

[0038] The upper end of the worm 29 is fixedly connected to a gear 30, and the side wall of the push-pull rod 11 is provided with a tooth groove along its length direction. The gear 30 is meshed with the push-pull rod 11, and the push-pull rod 11 is used as the driving force to drive the positioning chuck 18 to intermittently rotate a certain angle, thereby realizing the rotation of the steel pipe. There is no need to set up an additional power drive device, and the paint spraying position of the steel pipe can be automatically changed, and the reciprocating movement of the paint spray gun 2 and the rotation of the steel pipe can be synchronized and coordinated to improve the efficiency of the painting work.

[0039] The working principle of the present invention is as follows:

[0040] When in use, the steel pipe to be painted is placed on the workbench 3, and the two hydraulic cylinders 4 are started to push the two positioning plates 5 closer. The two ends of the steel pipe are positioned by the positioning chucks 18 on the positioning plates 5. When the two positioning plates 5 are close to each other to position the steel pipe, the two piston plates 17 are pushed close to each other by the piston rod 16 to squeeze the magnetorheological fluid 15 into the bellows 12. The shorter the length of the steel pipe, the more magnetorheological fluid 15 is squeezed into the bellows 12, so that the length of the bellows 12 is larger, and the bellows 12 pushes the pin shaft 9 to move in the slide groove 8, and then the position of the pin shaft 9 in the slide groove 8 can be automatically adjusted according to the length of the steel pipe, thereby realizing the adjustment of the swing amplitude of the paint spray gun 2, so that the swing range of the paint spray gun 2 is consistent with the length of the steel pipe, avoiding the situation of incomplete paint coverage or waste of paint;

[0041] The starting motor 7 drives the rotating disk 6 to rotate, and the rotating disk 6 drives the swing frame 10 to reciprocate through the pin shaft 9, and then drives the push-pull rod 11 to reciprocate, so that the paint spray gun 2 moves back and forth along the length direction of the steel pipe to spray paint, so that the paint spray gun 2 moves back and forth along the length direction of the steel pipe to spray paint fully and evenly. Compared with the prior art, there is no need for the staff to hold the paint spray gun, the degree of automation is high, and the problem of uneven paint thickness caused by human operation is effectively improved;

[0042] When the rotating disk 6 rotates, the centrifugal force causes the conductive block 21 to move the spring 23 to extend. At this time, the conductive block 21 contacts the power plate 22, so that the electrode plate 24 is energized. A strong magnetic field is formed between the two electrode plates 24. The fluidity of the magnetorheological fluid 15 in the bellows 12 is reduced under the action of the magnetic field, so that the length of the bellows 12 is prevented from changing due to the centrifugal force when the rotating disk 6 rotates, thereby realizing the positioning of the pin shaft and ensuring the accuracy of the reciprocating movement distance of the paint spray gun 2.

[0043] During the reciprocating motion of the push-pull rod 11, the gear 30 is meshed with the push-pull rod 11, which can drive the gear 30 to rotate. Since the worm 29 is meshed with the worm wheel 27, the worm wheel 27 can be driven to rotate. Since the rotating shaft 25 is connected to the worm wheel 27 through the one-way bearing 26, the positioning chuck 18 can be driven to intermittently rotate a certain angle when the push-pull rod 11 returns, thereby realizing intermittent rotation of the steel pipe. Without setting up an additional power drive device, the paint spraying position of the steel pipe can be automatically changed, and the reciprocating movement of the paint spray gun 2 and the rotation of the steel pipe can be synchronized and coordinated to improve the efficiency of the painting work.

Claims

1. A paint spraying device for steel pipe production and processing, comprising a housing (1) and a paint spraying gun (2), characterized in that: A workbench (3) is fixed in the box (1), hydraulic cylinders (4) are installed at both ends of the workbench (3), the output ends of the two hydraulic cylinders (4) are connected to positioning plates (5), the positioning plates (5) are slidably connected to the workbench (3), and a paint spraying mechanism for spraying paint on the steel pipe is arranged on the positioning plates (5); The paint spraying mechanism comprises a rotating disk (6) rotatably connected to the inner wall of the box body (1), a motor (7) for driving the rotating disk (6) to rotate is installed on the side wall of the box body (1), a slide groove (8) is provided on the side wall of the rotating disk (6), a pin shaft (9) is slidably fitted in the slide groove (8), a swing frame (10) is slidably sleeved on the pin shaft (9), a push-pull rod (11) is fixedly connected to the swing frame (10), the push-pull rod (11) is slidably arranged on the positioning plate (5), and the paint spraying gun (2) is installed on the push-pull rod (11); The chute (8) is provided with a bellows (12) arranged along its length direction, the two ends of the bellows (12) are respectively connected to the pin shaft (9) and the inner wall of the chute (8), a fluid cylinder (13) is fixed on the workbench (3), the output end of the fluid cylinder (13) is connected to the bellows (12) through a connecting pipe (14), the bellows (12) and the fluid cylinder (13) are filled with magnetorheological fluid (15), and the positioning plate (5) is connected to a valve stem in the fluid cylinder (13).

2. The paint spraying device for steel pipe production and processing according to claim 1 is characterized in that: A piston rod (16) is fixed on the side walls of the two positioning plates (5), the piston rod (16) extends into the liquid cylinder (13) and is fixed with a piston plate (17), and the piston plate (17) is sealingly slidably fitted in the liquid cylinder (13).

3. The paint spraying device for steel pipe production and processing according to claim 1 is characterized in that: Positioning chucks (18) are rotatably connected to the side walls of the two positioning plates (5) that are close to each other.

4. The paint spraying device for steel pipe production and processing according to claim 1 is characterized in that: A sleeve ring (19) is fixedly connected to the upper end of the positioning plate (5), and the sleeve ring (19) is slidably sleeved on the push-pull rod (11).

5. The paint spraying device for steel pipe production and processing according to claim 1 is characterized in that: A positioning mechanism for positioning the pin shaft (9) is also provided in the rotating disk (6), the positioning mechanism comprising two cavities (20) arranged on both sides of the slide groove (8), a conductive block (21) being slidably connected in the cavity (20), a power connection sheet (22) being fixedly connected in the cavity (20), and the conductive block (21) being connected to the inner wall of the cavity (20) via a spring (23).

6. The paint spraying device for steel pipe production and processing according to claim 5, characterized in that: The positioning mechanism also includes an electrode plate (24) installed in the cavity (20), the electrode plate (24) being electrically connected to a power source through a conductive block (21) and a power connection sheet (22), and the electrode plates (24) in the two cavities (20) being respectively connected to a positive electrode and a negative electrode of the power source, and when the conductive block (21) and the power connection sheet (22) are in contact, the electrode plate (24) is energized, and the fluidity of the magnetorheological fluid (15) is reduced under the action of a magnetic field, thereby achieving positioning of the pin shaft (9).

7. The paint spraying device for steel pipe production and processing according to claim 3 is characterized in that: The positioning chuck (18) is fixedly connected to a rotating shaft (25) coaxial therewith, and a worm gear (27) is fixed to the rotating shaft (25) via a one-way bearing (26).

8. The paint spraying device for steel pipe production and processing according to claim 7, characterized in that: A support plate (28) is fixedly connected to the side wall of the positioning plate (5), a worm (29) is rotatably connected to the support plate (28), and the worm (29) and the worm wheel (27) are meshed with each other.

9. The paint spraying device for steel pipe production and processing according to claim 8, characterized in that: The upper end of the worm (29) is fixedly connected to a gear (30), and the side wall of the push-pull rod (11) is provided with a tooth groove along its length direction, and the gear (30) and the push-pull rod (11) are meshed with each other.

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